Trolley



(No Model.)

G. A. HALL TROLLEY.

No. 597,848. Patented Jan. 25, 1898.

, axial recess 3.

UNITED STATES PATEN'r @Errea GEORGE A. HALL, OF PORTLAND, MAINE.

TROLLEY.

SPEGIFICATION forming part of Letters Patent No. 597,848, dated January 25, 1898.

Application filed February 6, i897. Serial No. 622,254. (No model.)

To all whom it may concern/.1

Be it known that I, GEORGE A. HALL, a

citizen of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Trolleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to improve the overhead trolley by providing one in which the stock of the grooved roller is swiveled to the lhead of the trolley-pole to provide a pivotal movement which will allow the roller to properly traverse the wire, particularly inl turning curves. Y

Heretofore in making a switch or curve with the rigid trolley the roller takes the wire at an angle and frequently fails to engage the right wire at the switch, also increasing the Wear on the wire at this point. IVith my invention these objectionable features are overcome without affecting the general work of the trolley.

In the accompanying drawings, forming a part of this speciiication, Figure l is a side eleva-tion of a trolley constructed in accordance with my invention. Fig. 2 is a vertical sectional. View. Fig. 3 is a rear elevation.

l indicates the head of the trolley-pole, which is provided at its lower end with the usual socket and at its upper end is formed into an annular flange 2, surrounding an On one side of thehead is an integral bracket ll, forming one of the bearings for two pulleys or guide-rollers 5 5, hereinafier more particularly referred to.

The upper end of the annular flange 2 is exteriorly threaded to be engaged by thecap G, the upper part of which is squared to re ceive a nutwrench for screwing and unscrewing the said cap. Centrally this cap has a vertical opening which receives the shank 7 of the stock of the grooved roller or trolley, the lower end of said shank being reduced to iit in the axial bearing. Upon this stock and within the annular iiange 2is secured a disk S by means of the transverse pin 9, said disk having an arm l0, which projects through a slot therefor in the said annular flange. In

terposed between this disk and an annular groove in the head are a series of friction rollers or balls l1, which provide for an easy pivotal' movement of the stock. The upper part of the stock is preferably curved rearward, as shown, and bifurcated to receive the grooved roller 12,1iavin g an axle j ournaled in bearings near the end of said l bifurcated members. The ends of this axle lie iiushwith the outer surface of the stock, said axle being held in place by spring-plates 13, secured at their lower ends to the stock by rivets la and having notches at their upper end adapted to be sprung into engagement with lugs l5, projecting from the stock. These plates hold the axle of the trolley or grooved roller in place and provide a construction by which the trolley or roller can be readily removed for repairs, dre.

16 designates a helical spring, one end of which is attached to a hook projecting from the head l and the other end is connected to a cord or flexible connection 17, extending through an opening therefor in the bracket 4: up between the rollers or pulleys 5, and attached at its other end to the arm lO of the disk S. This spring and its connection with the arm acts to normally hold the grooved roller or trolley on the proper line with respect to the pole.

The trolley hereinbefore described is eifective in operation, as the stock of the grooved roller being pivoted to the head permits said roller to be turned freely and follow the wire when making a curve, the tension of the spring 1G being only sufdcientrto normally hold the roller in a certain position to facilitate the. operation of movingtlie rollerin engagement with the Wire.

Having thus described my invention, I do not wish to be limited to the particular construction and arrangement of the parts herein shown, but reserve the right to modify such construction within the spirit and scope of my claims.

I claiml. In a trolley, the combination with the head having an annular flange, an axial recess and an annular groove, the latter being located between the recess and flange; of the stock bearing at its lower end in the axial recess, a disk secured to said stock and having an arm projecting through a Vslot in the an- IOO nular flange, antfriotion-ba-lls interposed between the disk andannular groove of the head; together with a spring, a oord connecting the spring to the arm of the disk, and

guides. between which the eord passes, substantially as shown and for the purpose set forth.

2. In a trolley, the combination with the head, havingan annular flange and a Cap secured thereto, of the stock of the roller bearing in said cap a disk secured. to' said stock f and provided with a projecting arm, balls interposed between the disk and head; together with the spring, a oord connecting said spring to the arm, and guides between which the oord passes, substantialb7 as shown, and for the purpose set forth.

3. In a trolley, the combination With the head, of the rollenstook pivotally supported on said head, an arm projecting from the stock, a spring Connected to the head, and a oord or flexible connection extending from the spring,` to the arm; together With guiderollers between which the cord passes, substantially as shown andfor the purpose set forth.

4t. In atrolley, the combination with the curved rollerstoek,`of the roller having an f axle the ends of which lie flush with the outer 

